Sea Level Change Curve Calculator (2014.88)
U.S. Army Engineer Institute for Water Resources
User Manual (DRAFT)
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual Table of Contents
1. INTRODUCTION .................................................................................................................................... 2 1.1 BACKGROUND ..................................................................................................................................................... 2 1.1.1 INFORMATION QUALITY ACT ............................................................................................................................ 2 1.2 OVERVIEW ........................................................................................................................................................... 3 1.2.1 USACE SCENARIOS – ER 1100-2-8162 ........................................................................................................... 3 1.2.2 NOAA SCENARIOS - OAR CPO-1 .................................................................................................................... 4 1.2.3 NRC 2012 VALUES (WEST COAST ONLY) ........................................................................................................ 5 1.2.4 NPCC 2013/2015 VALUES (NEW YORK CITY ONLY) ....................................................................................... 5 1.3 SAMPLE CALCULATIONS ...................................................................................................................................... 5 2. OPERATION OF SEA LEVEL CALCULATOR TOOL ......................................................................... 6 2.1
2.3
2.4
2.5
2.6
2.7
2.8
USER CONTROLS ................................................................................................................................................. 6 OUTPUT TABLE ................................................................................................................................................. 12 GRAPH OF PROJECTED RELATIVE SEA LEVEL CHANGE CURVES ....................................................................... 13 CURVE INTERSECTIONS TABLE .......................................................................................................................... 14 GRAPH AND TABLE OF GAUGE DATUMS, EWLS, CRITICAL ELEVATIONS, AND BFE ......................................... 15 GRAPH AND TABLE OF THE RELATIVE SEA LEVEL CHANGE BETWEEN DATES .................................................. 16 NOAA PLOTS .................................................................................................................................................... 17 APPENDIX A: REFERENCES ....................................................................................................................... 18 APPENDIX B: LIST OF 2014.88 ENHANCEMENTS .................................................................................... 19 http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 1. Introduction
This manual is designed to guide the user through the U.S. Army Corps of Engineers (USACE)
Sea Level Change Curve Calculator, providing step-by-step instructions for using the online tool.
1.1 Background
USACE updated its guidance on considerations for sea level change (SLC) in Civil Works
programs and projects to ensure sustainable performance in the future and combine the postKatrina recommendations around land subsidence, tidal fluctuations, and sea level change,.
Beginning in 2009, USACE policy and guidance required that all coastal projects be evaluated
with respect to changes in sea level throughout the project life-cycle.
The need to incorporate projected changes to Local Mean Sea Level (LMSL) into the design of
USACE Civil Works projects required the development of a simple, web-based tool to provide
repeatable analytical results. This Sea Level Change Curve Calculator was developed under the
Comprehensive Evaluation of Projects with Respect to Sea Level Change (CESL) component of
the Responses to Climate Change Program. The calculator is also used in the CESL screeninglevel vulnerability assessments for USACE coastal projects.
The USACE Sea Level Change Curve Calculator uses the methodology described in Engineer
Regulation 1100-2-8162, “Incorporating Sea Level Changes in Civil Works Programs.” The tool
also provides comparisons to scenarios in National Oceanic and Atmospheric Administration
(NOAA) 2012 Technical Report OAR CPO-1, “Global Sea Level Rise Scenarios for the United
States National Climate Assessment,” and the National Research Council’s (NRC) 2012 report,
“Sea Level Rise for the Coasts of California, Oregon, and Washington: Past, Present, and
Future”, and New York City Panel On Climate Change’s “Climate Risk Information 2013,
DRAFT Climate Methods Memorandum”, December 17, 2013
1.1.1 Information Quality Act
This section describes the testing and validation of the computational accuracy consistent with
the Information Quality act as described in the memorandum, “Ensuring Quality of Information
Disseminated to the Public by the Department of Defense”.
1.1.1.1 Utility
The calculator is designed to help with the application of the guidance found in ER 1100-2-8162
and Engineer Technical Letter (ETL) 1100-2-1, “Procedures to Evaluate Sea Level Change:
Impacts, Responses, and Adaptation.”
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 1.1.1.2 Objectivity
The calculator conforms to the guidance found in ER 1100-2-8162. Other than using the
equations in the regulation to produce tables and graphs, this tool makes no predictions or draws
any conclusions. It is recommended that the user become familiar with the guidance prior to
using the calculator’s output for any influential decisions.
1.1.1.3 Quality
The computations for future sea levels based on ER 1100-2-8162 have been independently
checked by personnel at the New Orleans, Galveston, and Honolulu District offices. The extreme
water levels are based on statistical probabilities using recorded historic monthly extreme water
level values. NOAA’s Technical Report, "Extreme Water Levels of the United States 18932010" describes the methods and data used in the calculation of the exceedance probability levels
using a generalized extreme value (GEV) statistical function. The USACE method uses the same
NOAA recorded monthly extreme values in a percentile statistical function. Both methods use
data recorded and validated by NOAA at the tide gauges. The extreme values at the gauge can
be significantly different than what may occur at the project site.
1.1.1.5 NOAA CO-OPS Data Quality
Much of the calculator relies on data supplied by the NOAA Center for Operational
Oceanographic Products and Services (CO-OPS), such as tide data, datums, some projected
extreme water level events, etc. CO-OPS has an extensive QA/QC program for the collection of
water levels outlined in their report “CO-OPS Evaluation Criteria for Water Level Station
Documentation.”
1.2 Overview
The online Sea Level Change Curve Calculator consists of a web-based tool that accepts user
input such as project start date, selection of an appropriate NOAA long term tide gauge, and
project life span, to produce a table and graph of the projected sea level changes for the
respective project. The calculator was developed to calculate the UASCE sea level change
scenarios, but can also be used to develop other scenarios for comparison purposes. These
include scenarios developed by NOAA (2012), the National Research Council (NRC, 2011), and
the New York City Panel on
1.2.1 USACE Scenarios – ER 1100-2-8162
As shown below, using a eustatic sea level change rate of 1.7 mm/year and the start date of 1992,
the updated values for the variable b in the 1987 NRC report are equal to 2.71E-5 for modified
NRC Curve I (USACE Intermediate Rate Scenario), and 1.13E-4 for modified NRC Curve III
(USACE High Rate Scenario). The year 1992 is used to start these curves because 1992 is the
mid-year of the NOAA National Tidal Datum Epoch (NTDE) of 1983–2001. The current tidal
datums and their relationship to NAVD88 are referenced to this point in time. The “USACE Low
Rate Scenario” extrapolates the historic rate of sea level change.
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual Variable b
Eustatic Sea Level
Start
Date
Change Rate
1.7mm/year
*1992
NRC Curve I
NRC Curve III
Used for the USACE Intermediate
Rate Curve
Used for the USACE High Rate Curve
2.71E-5
1.13E-4
*The mid-year of the current National Tidal Datum Epoch (NTDE) of 1983-2001.
1.2.2 NOAA Scenarios - OAR CPO-1
As shown below, NOAA’s scenarios also begin at 1992 but produce 4 curves based on a rise of
2.0, 1.2, 0.5, and 0.2 meters by 2100. To fit the curves to the scenarios defined above, the
constant b has a value of 1.56E-04 (Highest Scenario), 8.71E-05 (Intermediate-High Scenario),
and 2.71E-05 (Intermediate-Low Scenario). The NOAA Intermediate Low Scenario is the same
as the USACE Intermediate Scenario. NOAA also extrapolates the historic tide gauge rate for the
Low Rate Scenario.
Start Date
1992
Constant b
Highest Scenario
Intermediate-High Scenario
Intermediate-Low Scenario
1.56E-04
8.71E-05
2.71E-05
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 1.2.3 NRC 2012 Values (West Coast Only)
The National Research Council’s 2012 report breaks the west coast into 4 regions associated
with the gauges at Seattle, WA, Newport, OR, San Francisco, CA, and Los Angeles, CA. The
calculator will find the closest of these four gauges to the user’s selected gauge and provide the
NRC2012 values in the table and on the chart. The NRC2012 values are relative to the year
2000. The calculator extrapolates the historic rate of SLC at the user’s selected gauge from 1992
(the mid-point of the current National Tidal Datum Epoch) to 2000 in order to relate the report’s
projected values to LMSL and NAVD88.
1.2.4 NPCC 2013/2015 Values (New York City Only)
The New York City Panel on Climate Change 2013 report and the New York City Panel on
Climate Change 2015 report compute projected sea level for the Bronx, Brooklyn, Manhattan,
Queens, and Staten Island Boroughs of New York. 10th percentile, 25th percentile, 75th
percentile, and 90th percentiles are tabulated and shown on the curves graph. The 2020s (2050s,
2080s) is a ten year average of the projections from 2020-2029 (2050-2059, 2080-2089).
1.3 Sample calculations
Global mean SLC for any of the accelerating scenarios can be calculated using Equation 2 in
USACE ER 1100-2-8162. For example, the projected USACE High Rate SLR for 2060 can be
computed by:
E(t) = 0.0017t + bt2
Where:
 t = 2060 – 1992 = 68
 generally accepted eustatic sea level rise rate = 1.7 mm/yr or 0.0017 m/yr
 b = 0.0001130 from ER 1100-2-8162 (high rate)
 E = the change in global mean sea level between 1992 and 2060 (for this
example) using the high rate scenario
E = (0.0017*68) + (0.0001130*682)
E = (0.1156) + (0.0001130*4624)
E = 0.638112 meters in this example.
ER1100-2-8162, Equation 2 does not contain the local Vertical Land Movement (VLM). The
rate used to develop the local relative SLC is a combination of the widely accepted eustatic rate
of 1.7 mm/yr plus the VLM (“M”). The “0.0017” in Equation 2 would be substituted with the
appropriate rate of relative SLC for the gauge selected. To account for local VLM, we substitute
0.017 with either the published or regionally corrected rates, both of which are provided by
NOAA CO-OPS. The published rates are available from the CO-OPS Sea Level Trends website
at: tidesandcurrents.noaa.gov/sltrends/sltrends.html. The regionally corrected rates can be
developed with the information contained in the referenced NOAA Technical Report NOS COOPS 065.
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual Modifying Equation 2 to substitute either the published or the regionally corrected rate as “M”
we get:
E(t) = Mt + bt2
Where
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t = 2060 – 1992 = 68
M = the generally accepted eustatic sea level rise rate 1.7 mm/yr plus the VLM of
-1.23 mm/yr at the Montauk gauge in New York (from NOS CO-OPS 065 Table
1) = 2.93 mm/yr
b = 0.0001130 from ER 212 (high rate)
E = (0.00293*68) + (0.0001130*682)
E = (0.19924) + (0.0001130*4624)
E = 0.721752 meters in this example.
The calculator also produces a chart and table showing the projected change between the project
start and end. The is done by manipulating equation (2) to account for the fact that it was
developed for eustatic sea level rise starting in 1992, while projects will actually be constructed
at some date after 1992, resulting in equation (3):
E(t2) – E(t1) = 0.0017(t2 – t1) + b(t22 – t12)
Where
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t1 = the time between the project’s construction date and 1992
*t2 = the time between a future date at which one wants an estimate for sea level
change and 1992
*Or t2 = t1 + number of years after construction
This shows only the changes in sea level, and does not reference a particular datum, which is
why it does not plot any user entered BFE or critical elevations.
2. Operation of Sea Level Calculator Tool
2.1 User Controls
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual The tool applies the user selected controls into the appropriate equation depending on selected
output to produce a graph and table of the projected SLC curves.
A
B
C
Figure 1: USACE Sea Level Change Curve Calculator User Controls
A. Project Name: The user can enter a project name to be displayed on top of the curves
chart and table.
B. Gauge Selection: There are two ways that a user
can select the appropriate NOAA gauge: (1)
Clicking on the project area on the map (Figure
2-2) in the location of the project, or (2)
Selecting a gauge from the drop-down menu
(right). If the user chooses option (1), the
calculator will choose the gauge closes to the
area clicked on the map. Selecting a gauge via the drop-down menu in option (2) will
cause the calculator to zoom the Google Map insert to the selected gauge. There may be
additional factors other than proximity to consider when selecting a gauge.
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual C. FEMA Base Flood Elevation: If desired, the user may enter a FEMA Base Flood
Elevation. If the selected gauge is not connected to NAVD88, the BFE will have to be
converted to LMSL before being entered. Select BFE in the “Plot EWL and/or BFE”
pull-down to plot the BFE on top of the selected SLC curve. Links are provided to more
information and locating the area’s BFE.
D
E
F
H
G
Figure 1-2: USACE Sea Level Change Curve Calculator User Controls cont’d
D. Project Start Year Enter the project’s starting year. This will determine what the curves
and tables will use as a starting point.
Note: Relative sea level change will always begin its computations in 1992; however, the project
start year will determine when to start displaying the values.
E. Year Interval Enter the interval of years desired for the output tables. Any value entered
other than five will compute all years relative to the starting year. If the value is 5, all
years will be computed as even intervals of 5 (i.e. 2005, 2010, 2015, etc).
F. Project End Year: Enter the project’s ending year (1992-2150).
Note: Use caution when projecting out beyond 2120.
G. Output Units: The user may optionally change the unit of measure.
Note: The default unit of measure is feet.
H. Output Datum: The output datum may also be selected by clicking on the desired
checkbox. Local Mean Sea Level (LMSL) or the North American Vertical Datum of
1988 (NAVD88) are available.
Note: NAVD88 is not available for all gauges.
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator I
J
K
User Manual L
M
N
Figure 1-3: USACE Sea Level Change Curve Calculator User Controls cont’d
I. Output Agency: USACE and NOAA projections are available at any tide gauge
location, and any combination may be selected by clicking on the desired checkboxes.
Note: For the gauges in California, Oregon, and Washington, you may also elect to show the
NRC2012 projections. For “The Battery” in New York, you may also elect to show the
NPCC2013/2015 projections.
J. SLC Rate: Select either the (1) NOAA published rate of Sea Level Change, which are
published on the CO-OPS website, or (2) the regionally corrected rates from NOAA
Technical Report NOS CO-OPS 065. The user may optionally enter in an alternate rate
and click on the [Display Data] button.
Note: Per NOAA, long term sea level trends observed in tide station records include a component
due to oceanographic variables and a component due to local Vertical Land Motion (VLM). The
oceanographic component includes the global (eustatic) sea level trend, plus tide station location
specific sea level variations acting on different scales (local to regional) and at different
frequencies (storm surge to seasonal to decadal scale). In the past, local VLM has been estimated
simply by subtracting the global sea level trend from the local mean sea level trend developed
from local tide station records. NOAA Technical Report NOS CO-OPS 065, Estimating Vertical
Land Motion from Long-Term Tide Gauge Records, dated May 2013 provides improved estimates
of local VLM through a process which references regional long-term tide stations and removes
regional oceanographic variability. These regionally corrected VLM estimates added to the global
sea level trend provide more technically accurate local mean sea level trends.
K. EWL Type: Select the desired type of Extreme Water Levels to display.
Note: Low water extremes are not available using the USACE Percentile method.
L. EWL Source: Select the desired source of the EWLs, the USACE produced Percentile or
NOAA produced Generalized Extreme Value (GEV).
M. Chart Size: The chart height and width may be changed by adding the desired values in
the text boxes.
Note: The [Display Data] button must be clicked to re-plot the charts.
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual N. Plot EWL, BFE, or Tides: from the pull-down, select the desired return period, base
flood elevation, or tides along with the curve upon which to display them.
P O
Q
Figure 1-4: USACE Sea Level Change Curve Calculator User Controls cont’d
O. Critical Elevations: The user may also include 2 critical elevations to plot on the SLC
curve and gauge datums graphs. ETL 1100-2-1 describes a critical elevation or threshold
as, “… intended to identify a water surface elevation at which a structural condition
changes or system performance changes. For example, a structure can either fail or be
overtopped at a certain water elevation, and a drainage system might start to back up at a
certain water elevation. A tipping point refers to a critical point, after the threshold, when
stability and/or performance begin to rapidly decline and impacts increase dramatically.
Determining tipping points that would generate a necessary action in the future is an
essential element of alternative development with respect to SLC.” The user-entered
thresholds may also be described by entering a description in the text boxes provided.
These descriptions will appear on the chart legends. The range of tipping points
produced between the low and high SLC curves defines the future time uncertainty of
performance changes referenced to the critical elevation.
Keep in mind the various water surfaces when determining the critical elevation. As
MSL approaches the critical elevation, high tide must be considered. If in this scenario,
MHHW or high tide is 2 feet higher than MSL, the first floor will be inundated with
every high tide when MSL gets to 3.1’. The calculator provides the years at which
MLLW, LMSL, and MHHW all reach the critical elevation(s). The user can also select
an Extreme Water Level such as a 100 yr event to be included in the tabulation of
intersections of water levels and critical elevations.
P. Download CSV: click on the
of the selected table.
button to create and download a .csv file
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual *note – CSV download is only available when using the Firefox browser.
Q. User Entered Index: The user may optionally enter in a value to be added to the
calculated curves. This may be used for Flood Risk Reduction Standards as described in
ECB 2013-33, overbuild, etc. Caution… this does not perform any computations based
on water depth; it simply adds the entered value as a constant to the water surface
calculated for the selected scenarios. A description of the index value can also be entered.
2.2 Gauge Map
Along with the output curve table and graph, an interactive Google map is produced showing the
location of the user selected gauge. The user can zoom in, zoom out, and pan the map. The
example below shows the location of the San Diego gauge, as represented by the blue push pin.
Figure 2-2: Gauge Map
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 2.3 Output Table
The projected water level heights relative to either LMSL or NAVD88 are tabulated for each of
the requested scenarios at a 5 year interval. The tabulated heights will be displayed in the
selected unit of measure, either feet or meters and relative to the selected output datum. In the
example shown below, the USACE, NOAA, and NRC scenarios were selected for the Santa
Monica tide gauge.
Figure 2-3: Example Output Table
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 2.4 Graph of Projected Relative Sea Level Change Curves
An interactive Google graph is produced along with the output table. The graph displays the
relative sea level change curves according to the user supplied inputs and options. The user can
hover over a node of the curve to display the value at that point. Zooming is also possible using
the button’s scroll wheel. In the example shown below, the USACE, NOAA, and NRC scenarios
were selected for the Santa Monica tide gauge. Two different elevation thresholds were input,
labeled Emergency Generators and Levee Crown. A BFE was also selected. Finally, an extreme
water level (100-yr recurrence interval calculated by NOAA using the GEV) is plotted on the
USACE high curve.
Figure 2-4: Projected Relative Sea Level Change Curves
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 2.5 Curve Intersections Table
The year at which the selected curve (item M) intersects the user entered critical elevations
and/or base flood elevation is produced. The curves from the selected agency and the critical
elevations and BFE are shown by default. The user can select an EWL to be included in the
tabulation as described in K, L, and N above. In the example shown below, intersections are
shown for two different elevation thresholds input, labeled Levee Crown and 1st Floor.
Figure 2-5: Intersections Table
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 2.6 Graph and Table of Gauge Datums, EWLs, Critical Elevations,
and BFE
The established datums and the user selected *EWLs, along with any user entered critical
elevations and/or a BFE, are tabulated and graphed as show in Figure 2-5 below. The graph
shows the relationship between the various datums and elevations.
*Note that the EWLs have the historic rate of the selected gauge applied to account for SLC from 1992 to
the project start year.
Figure 2-6: Gauge Datums, EWLs, Critical Elevations, and BFE
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 2.7 Graph and Table of the Relative Sea Level Change Between
Dates
The table and graph shown in Figure 2-6 below shows the relative differences in the water level
between the user entered project start and end dates for the USACE and NOAA scenarios. Both
the graph and table start at zero in the project start year.
Note: Associating this with a particular datum is not possible unless an assumed rate/curve is used to
transfer the datums developed for the current NTDE to the project start year. This calculator does not make
that determination; therefore, no critical elevations or BFE will be shown on the graph. The Sea Level
Change Curve Calculator simply shows the change in height during the project’s life.
Figure 2-7: Relative Sea Level Change Between Dates
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual 2.8 NOAA Plots
At the bottom of the page of the tool are NOAA plots of extreme water levels. These plots use
the GEV function and display the period of record water levels. Clicking on either plot brings up
the NOAA CO-OPS webpage for the selected gauge.
Figure 2-8: NOAA Plots
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual Appendix A: References
National Research Council, “Sea Level Rise for the Coasts of California, Oregon, and
Washington: Past, Present, and Future”, 2012
http://www.nap.edu/openbook.php?record_id=13389
NOAA Technical Report NOS CO-OPS 065, Estimating Vertical Land Motion from Long-Term
Tide Gauge Records. http://tidesandcurrents.noaa.gov/publications/Technical_Report_NOS_COOPS_065.pdf
NOAA Technical Report OAR CPO-1, “Global Sea Level Rise Scenarios for the United States
National Climate Assessment”, December 6, 2012
http://www.cpo.noaa.gov/sites/cpo/Reports/2012/NOAA_SLR_r3.pdf
USACE ER 1100-2-8162 Incorporating Sea level Changes in Civil Works Programs, 31
December 2013.
http://www.publications.usace.army.mil/Portals/76/Publications/EngineerRegulations/ER_11002-8162.pdf
New York City Panel On Climate Change’s “Climate Risk Information 2013, DRAFT Climate
Methods Memorandum”, December 17, 2013
http://www.nyc.gov/html/planyc2030/downloads/pdf/NPCC2_Climate%20Methods%20Memora
ndum_2013.pdf
New York City Panel on Climate Change 2015 Report, January, 2015
http://onlinelibrary.wiley.com/doi/10.1111/nyas.12593/pdf
ETL 1110-2-1, “Procedures To Evaluate Sea Level Change: Impacts, Responses, And
Adaptation”, 30 June 2014.
http://www.publications.usace.army.mil/Portals/76/Publications/EngineerTechnicalLetters/ETL_
1100-2-1.pdf
Memorandum, “Ensuring Quality of Information Disseminated to the Public by the Department
of Defense”.
http://www.usace.army.mil/Portals/2/docs/authorization_form.pdf
CO-OPS Evaluation Criteria for Water Level Station Documentation, 25 October 2013
http://tidesandcurrents.noaa.gov/publications/COOPS_Evaluation_Criteria_for_Water_Level_Station_Documentation_updated_October_2013.pd
f
http://www.corpsclimate.us/ccaceslcurves.cfm Sea Level Change Calculator User Manual Appendix B: List of 2014.88 Enhancements
2014.88 major enhancements and modifications to the superseded calculator at
http://www.corpsclimate.us/ccaceslcurves(superseded).cfm include:
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Ability to click on gauge map to select project gauge
Table and graph of gauge datums and Extreme Water Levels
Option for output datum (LMSL or NAVD88)
Option to output values from NRC 2012 for locations on the west coast
Option to output values from NPCC 2013/2015 for New York City (The Battery)
Option for published or regionally corrected SLC rates
Option to include Extreme Water Levels
Option for EWL source (USACE Percentile or NOAA GEV)
Graph and table of curves using ER 1100-2-8162 equation 3
Optional critical elevations
Displayed CO-OPS EWL and Period of Record images for selected gauge
Use of JSON formatted data. Will allow for future transition to real-time data
Development of Intersection Table of water levels to critical elevations
Option for user to enter an index to add to projected water surfaces
CSV output option for Firefox browser
Print option for tables and graphs
http://www.corpsclimate.us/ccaceslcurves.cfm